writes "In an article published by Forbes earlier this week, AMD lashed out at Nvidia's GameWorks program, which includes Watch Dogs and other popular titles, such as Call of Duty: Ghosts, Assassin's Creed IV, and Batman: Arkham Origins. Technical communications lead for PC graphics Robert Hallock alleged that GameWorks deliberately cripples performance on AMD hardware. He also claimed that developers are prevented from working with AMD on game optimizations. The Forbes piece was fairly damning, but it didn't include any commentary from the other side of the fence. Nvidia has now responded to the allegations, and as one might expect, it denies them outright. Director of engineering for developer technology Cem Cebenoyan says Nvidia has never barred developers from working with AMD. In fact, he claims that AMD's own developer relations efforts have prevented Nvidia from getting its hands on early builds of some games. AMD has said in the past that it makes no effort to prevent developers from working with Nvidia. So, we have another round of he said, she said, with gamers caught in the middle and performance in newer titles hanging in the balance."